Accession Number : AD0617108

Title :   DEFORMATION PROCESSING OF ANISOTROPIC METALS.

Descriptive Note : Final rept. for 1 Jul 63-30 Jun 64,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE METALS PROCESSING LAB

Report Date : JAN 1965

Pagination or Media Count : 29

Abstract : A procedure for the experimental determination of the yield locus which uses only uniaxial tension and compression and plane strain compression is described. The yield locus for plastically-anisotropic material can also be predicted from the Hill theory using only the uniaxial yield strength and a parameter, R, which is the ratio of width to thickness strains in a uniaxial test provided that the deformation mode and yield strength are independent of the sign of the stress. Agreement of the predicted and experimental loci was very good in the tension-tension quadrant in alpha titanium textured with (0002) normal to the sheet. Discrepancies in the compression-compression quadrant are a result of 1012 mechanical twinning with compression normal to the c axis. Some additional experiments on the temperature dependence of plastic anisotropy in titanium, and plastic anisotropy in f.c.c. solidification textures are also discussed. Finally some observations of superplasticity in Ti-5Al-2.5Sn are described. (Author)

Descriptors :   (*TITANIUM ALLOYS, DEFORMATION), (*METALS, ANISOTROPY), PLASTIC PROPERTIES, TEMPERATURE, STRAIN(MECHANICS), TENSILE PROPERTIES, COMPRESSIVE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE